81 x 9 = 801. What must you do to make the this equation true?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What happened when the wheel was invented?

What has many teeth, but cannot bite?

What shoe company does this rebus represent?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Can you identify the hidden rebus in the image below?